Investments - Schedule of Changes in Unrealized Appreciation (Depreciation) of Available for Sale Securities and Other Investments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Increase (decrease) in unrealized appreciation (depreciation) of investments	$ 322	$ (1,202)
Equity Securities, FV-NI, Unrealized Gain (Loss) [Abstract]
Net gains (losses) recognized during the period on equity securities and other investments	242	171
Less: Net gains (losses) recognized during the period on equity securities and other investments sold during the period	12	39
Unrealized gains (losses) recognized during the reporting period on equity securities and other investments still held at the reporting date	230	132
Corebridge Financial Inc
Equity Securities, FV-NI, Unrealized Gain (Loss) [Abstract]
Unrealized gains (losses) recognized during the reporting period on equity securities and other investments still held at the reporting date	209
Fixed maturity securities | Continuing Operations, Excluding Held-For-Sale
Debt Securities, Available-for-sale [Line Items]
Increase (decrease) in unrealized appreciation (depreciation) of investments	322	(132)
Equities
Equity Securities, FV-NI, Unrealized Gain (Loss) [Abstract]
Net gains (losses) recognized during the period on equity securities and other investments	9	88
Less: Net gains (losses) recognized during the period on equity securities and other investments sold during the period	13	40
Unrealized gains (losses) recognized during the reporting period on equity securities and other investments still held at the reporting date	(4)	48
Other invested assets
Equity Securities, FV-NI, Unrealized Gain (Loss) [Abstract]
Net gains (losses) recognized during the period on equity securities and other investments	233	83
Less: Net gains (losses) recognized during the period on equity securities and other investments sold during the period	(1)	(1)
Unrealized gains (losses) recognized during the reporting period on equity securities and other investments still held at the reporting date	$ 234	$ 84